<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <script src="./js/jquery-3.6.0.min.js" type="text/javascript"></script>
        <script type="text/javascript">
        $(document).ready(function() {
            $("button").click(function(){
                $("p").css({"font-size":"200%","background-color":"yellow","border":"6px dpuble blue"});
            });
        });
        </script>
    </head>
    <body>
        <h2>单击按钮看看段落字体、背景和边框的变化</h2>
        <p>段落内容换肤</p>
        <button type="button">段落换肤</button>
    </body>
</html>